Did Amtrak engineer Brandon Bostian have a seizure?...

it's a very real possibility.

Even considering the time it takes a train to slow down (considerable), for that train to enter a curve rated for 50mph at 106mph means that he would have had to start slowing the train many miles before the curve. Since he was traveling so fast, that distance would be covered in the space of time it takes to have a seizure.

There is no indication in his past that he would suddenly turn into some rogue engineer and drive that train so far over the speed limit. 

I'm not willing to throw him under the bus (train?) quite yet.  I think we need to wait for all the results of the investigation to come in because it's the right thing to do. 

And to criticize him for having an attorney and initially refusing to speak to the authorities is nuts.  Any prudent person would do the same thing.

His attorney has stated:

“Among other things, they indicated that they wanted to get a search warrant for his blood, which we consented to,” Goggin added. “He said, ‘You don't need a search warrant, happy to give it to you.’ It had already been drawn at Einstein Hospital. They asked for his cell phone, which they had. [We] said, ‘Have it. Take all the information you want. You don't need a search warrant for that either. We'll give it to you.’ I'm assuming [authorities asked for the phone] because they want to see whether he was on the telephone at the time of the accident. So he's cooperated, and not only that, he's indicated that he would make himself available to the police if they need any more information.”  more

As for being a ghey activist?  So what?  He has a right. 

The real abomination of this incident is the Demon-crats using this to blame Republicans for not approving an additional several billion to shore up a rail service which benefits the elites of DC.  Amtrak needs to be privately owned.  Period.